Programmer 7500

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Text File | 1987-01-14 | 14.3 KB | 299 lines

;=C ! pop stack to memory - "store" n addr -- ;=: !CSP save SP at CSP -- ;=: # convert one digit of d1 to ASCII d1 -- d2 ;=: #> end number formatting d -- addr count ;=# #BUFF total number of block buffers -- n ;=: #S process all significant digits of d1 d1 -- 0. ;=: ' find next input word in dictionary -- PFA ;=: ( begin a comment ended by ')' -- ;=C (+LOOP) (LOOP) with increment on S1 n -- ;=: (.") run time code for ." -- ;=C+ (2ARR) 2d array addressing primitive n1 n2 addr1 -- addr2 ;=C+ (2CARR) 2d byte array addressing primitive n1 n2 addr1 -- addr2 ;=: (;CODE) run time code for ;CODE -- ;=: (ABORT) error function when WARNING is -1 -- ;=C+ (ARRAY) 1d array addressing primitive n1 addr1 -- addr2 ;=C+ (BLKRD) block read primitive -- ;=C+ (BLKWRT) block write primitive -- ;=C+ (CARR) 1d byte array addressing primitive n addr1 -- addr2 ;=C+ (CLOSE) close FCB, f is TRUE on error FCB -- f ;=C* (CR) console newline primitive -- ;=C+ (CREATE) create file, f is TRUE on error FCB -- f ;=C (DO) run-time loop initialization n2 n1 -- ;=C* (EMIT) console char. output primitive c -- ;=C+ (FBLKRD) read n blocks from file FCB n -- f ;=C+ (FBLKWRT) write n blocks to file FCB n -- f ;=C* (FIND) dictionary search primtive a1 NFA -- [PFA b] f ;=C+ (FNAME) parse filename at addr using mode n FCB addr1 n -- addr2 f ;=C* (KEY) read console primitive -- c ;=: (LINE) convert a line/screen to addr/count l s -- addr count ;=C (LOOP) execution time loop code -- ;=: (NUMBER) ASCII to binary conversion primitive d1 addr1 -- d2 addr2 ;=C+ (OPEN) open FCB, f is TRUE if error FCB -- f ;=C+ (READ) read next record from file to addr FCB addr -- f ;=C+ (WRITE) write next record to file from addr FCB addr -- f ;=C+ (XOF) primitive compiled by CASE..OF n1 n2 -- [n1] ;=: * 16-bit signed multipication n1 n2 -- n1*n2 ;=: */ scale n1 by the ratio of n2 to n3 n1 n2 n3 -- nquot ;=: */MOD scale n1 by the ratio of n2 to n3 n1 n2 n3 -- nrem nquot ;=C + 16-bit addition n1 n2 -- nsum ;=C +! add to a memory location n addr -- ;=: +- apply the sign of n2 to n1 n1 n2 -- n3 ;=:* +BUF advance addr to next buffer addr1 -- addr2 ;=: +LOOP end of DO..+LOOP structure addr 3 -- ;=: +ORIGIN word for accessing data in low memory n -- addr ;=: , compile n into the dictionary n -- ;=C - 16-bit subtraction n1 n2 -- n1-n2 ---------- 4TH-DISK.ASM ---------- 4TH-FILE.ASM ---------- 4TH-MAIN.ASM ---------- 4TH-SYSD.ASM ---------- 4TH-XTNS.ASM ;=: --> continue with next screen -- ;=: -DUP duplicate the top number if it isn't 0 n -- n [n] ;=: -FIND search dictionary for next input word -- [PFA b] f ;=: -TRAILING adjust addr/n to avoid trailing blanks addr n1 -- addr n2 ;=: . print a 16-bit number n -- ;=: ." print the following string -- ;=: .LINE type line n1 in screen n2 n1 n2 -- ;=: .R print n1 right-aligned in n2 columns n1 n2 -- ;=: / 16-bit signed division n1 n2 -- nquot ;=: /MOD 16-bit signed division with remainder n1 n2 -- nrem nquot ;=# 0 zero -- 0 ;=C 0< test top of stack for negative value n -- f ;=C 0= test top of stack for zero n -- f ;=C 0BRANCH branch if f is zero f -- ;=# 1 one -- 1 ;=C 1+ increment the top stack item n -- n+1 ;=C+ 1- decrement the top stack item n -- n-1 ;=# 2 two -- 2 ;=C 2! 32-bit store d addr -- ;=C 2+ add 2 to the top stack item n -- n+2 ;=C+ 2- subtract 2 from the top stack item n -- n-2 ;=C 2@ fetch 32-bit number addr -- d ;=C 2DUP duplicate the top two stack items n1 n2 -- n1 n2 n1 n2 ;=# 3 three -- 3 ;=C : begin colon definition -- ;=: ; end colon definition -- ;=: ;CODE end colon compilation, start CODE -- ;=C ;S end of screen or run time colon word -- ;=C < test for top number > second number n1 n2 -- f ;=: <# begin number formatting -- ;=: <BUILDS define compile time behavior -- ;=: <nul> 0 in input: resets interpreter -- ;=: = test top two items for equality n1 n2 -- f ;=: > test for second item > top of stack n1 n2 -- f ;=C >R push parm. stack to return stack n -- ;=: ? print the value at addr addr -- ;=: ?COMP issue a message if not compiling -- ;=: ?CSP issue a message if SP <> (CSP) -- ;=: ?ERROR issue error message m if f is TRUE f m -- ;=: ?EXEC issue a message if not executing -- ;=C+ ?FIRST search for first matching file FCB addr -- f ;=: ?LOADING issue a message if not loading -- ;=C+ ?NEXT search for next matching file addr FCB -- f ;=: ?PAIRS issue a message if n1 <> n2 n1 n2 -- ;=: ?STACK check if the stack is out of bounds -- ;=C ?TERMINAL console status -- f ;=C @ push memory location to stack addr -- n ;=U+ @BLKRD CFA of function to read one block -- addr ;=U+ @BLKWRT CFA of function to write one block -- addr ;=?+ @BREAK CFA of function to get control on ^C -- addr ;=U+ @CR CFA of function to output newline -- addr ;=U+ @EMIT CFA of function to do character output -- addr ;=U+ @KEY CFA of function to do character input -- addr ;=: ABORT clear stacks and begin execution -- ;=: ABS take the absolute value of n1 n1 -- n2 ;=: AGAIN end of BEGIN..AGAIN infinite loop addr 1 -- ;=: ALLOT reserve n bytes in the dictionary n -- ;=C AND bitwise AND n n -- n ;=# B/BUF size of disk buffers in bytes -- 1024 ;=# B/SCR number of disk buffers per screen -- 1 ;=C+ B/SEC get bytes/sector -- n ;=: BACK compile a backward branch offset target -- ;=U BASE current number base for i/o -- addr ;=: BEGIN starting point of looping structures -- HERE 1 ;=# BL ASCII blank -- 32 ;=: BLANKS fill n bytes at addr with blanks addr n -- ;=U BLK current block, 0 if terminal -- addr ;=#+ BLK/DRIVE number of 1K blocks per drive -- n ;=:+ BLKRD read one block from disk to addr addr blk -- ;=:+ BLKWRT write one block to disk from addr addr blk -- ;=:* BLOCK get block n n -- addr ;=:+ BLOCK-READ read one block to addr addr blk -- ;=:+ BLOCK-WRITE write one block from addr addr blk -- ;=C BRANCH adds an inline offset to IP -- ;=:* BUFFER assign an available buffer to block n n -- addr ;=C* BYE exit FORTH ? -- ? ;=C C! byte store - "see-store" b addr -- ;=: C, compile a byte into the dictionary b -- ;=# C/L characters per line -- 64 ;=C C@ push byte location to stack addr -- b ;=: CFA convert a PFA to CFA PFA -- CFA ;=C CMOVE byte block move a1 a2 n -- ;=:* COLD full initialization and restart -- ;=: COMPILE compile the following word at run time -- ;=: CONSTANT define a symbolic constant n -- ;=U CONTEXT current vocabulary for execution -- addr ;=: COUNT prepare to type a string addr -- addr+1 n ;=:* CR output carriage return/line feed -- ;=:* CREATE create a dictionary header -- ;=U CSP temporary storage for Current SP -- addr ;=U CURRENT current vocabulary for definitions -- addr ;=:+ D&RCALC set drive/record for block n n -- ;=C D+ 32-bit addition d1 d2 -- dsum ;=: D+- apply the sign of n to d1 d1 n -- d2 ;=: D. print a 32-bit number d -- ;=: D.R print d right-aligned in n columns d n -- ;=: DABS take the absolute value of d1 d1 -- d2 ;=C+ DATE! set system date n1 n2 n3 -- ;=C+ DATE@ fetch system date -- n1 n2 n3 ;=: DECIMAL set the current number base to 10 -- ;=: DEFINITIONS set CURRENT to CONTEXT -- ;=C DIGIT convert c to binary using base n1 c n1 -- [n2] f ;=C+ DISK set default drive to n, n2 is #drives n -- n2 ;=? DISK-ERROR status of last disk operation -- addr ;=C+ DISK@ return default disk number -- n ;=: DLITERAL compile d to be used at run time d -- ;=C DMINUS 32-bit two's complement d -- -d ;=: DO start of DO..LOOP structure -- HERE 3 ;=: DOES> define run time behavior -- ;=U DP top address used in dictionary -- addr ;=U DPL Decimal Point Locator -- addr ;=: DR0 set offset for drive zero -- ;=: DR1 set offset for drive one -- ;=? DRIVE disk drive last accessed -- addr ;=C DROP throw out top stack item n -- ;=?+ DTA disk transfer address last used -- addr ;=C DUP duplicate the top stack item n -- n n ;=: ELSE optional part of IF..ELSE..THEN addr 2 -- HERE 2 ;=:* EMIT char output c -- ;=:* EMPTY-BUFFERS wipe out disk buffers -- ;=C ENCLOSE text scanning primitive a1 c -- a1 n1 n2 n3 ;=: END synonym for UNTIL addr 1 -- ;=: ENDIF end of IF..ELSE..THEN structure addr 2 -- ;=: ERASE fill n bytes at addr with 0's addr n -- ;=: ERROR system error handler - n is line no. n -- [IN BLK] ;=C EXECUTE executes the word at CFA CFA -- ? ;=: EXPECT input up to n characters to addr addr n -- ;=C+ FDEL delete file FCB -- f ;=U FENCE pointer to protected dictionary -- addr ;=C FILL fill n bytes at address with c addr n c -- ;=# FIRST address of lowest disk buffer -- addr ;=:* FLUSH empty buffers, saving changed ones -- ;=:* FORGET chop off the top of the dictionary -- ;=: FORTH FORTH vocabulary header -- ;=C+ FREN rename file addr -- f ;=: HERE next available dictionary location -- addr ;=: HEX set the current number base to 16 -- ;=U HLD text pointer used in number formatting -- addr ;=: HOLD insert char in formatted output c -- ;=C I leave index value -- n ;=: ID. print dictionary name field NFA -- ;=: IF conditional branch structure -- 2 ;=: IMMEDIATE mark the latest word to be executed -- ;=U IN current character in input stream -- addr ;=: INDEX print line 0 of screens n1 thru n2 n1 n2 -- ;=: INTERPRET outer text interpreter -- ;=:* KEY char input -- c ;=C+ L! intersegment store operator n seg off -- ;=C+ L@ intersegment fetch operator seg off -- n ;=: LATEST return the top NFA in CURRENT -- NFA ;=C+ LC! intersegment byte store b seg off -- ;=C+ LC@ intersegment byte fetch seg off -- b ;=C LEAVE force loop exit -- ;=: LFA convert a PFA to LFA PFA -- LFA ;=# LIMIT last available memory address + 1 -- addr ;=: LIST list screen n, as 16 lines of 64 chars n -- ;=C LIT push an inline literal -- n ;=: LITERAL compile n to be used at run time n -- ;=: LOAD interpret screen n n -- ;=: LOOP end of DO..LOOP structure addr 3 -- ;=: M* mixed multiplication n1 n2 -- d ;=: M/ mixed division d n1 -- nrem nquot ;=: M/MOD mixed unsigned scaler ud1 u -- urem udquot ;=C MATCH string search primtive addr1 n addr2 n -- f addr3 ;=: MAX return the larger of two numbers n1 n2 -- n ;=#+ MAXBLOCK highest valid block number -- n ;=#+ MAXDRIVE highest valid drive number -- n ;=: MESSAGE type error message n n -- ;=: MIN return the smaller of n1 and n2 n1 n2 -- n ;=C MINUS 16-bit two's complement n -- -n ;=: MOD 16-bit modulo division n1 n2 -- nrem ;=C+ MYSEG get FORTH's segment -- seg ;=:* NFA convert a PFA to NFA PFA -- NFA ;=: NOOP do nothing - no operation -- ;=: NUMBER convert string at addr to 32-bit number addr -- d ;=U OFFSET number of lowest block to be used -- addr ;=C OR bitwise OR n n -- n ;=U OUT count of characters output -- addr ;=C OVER copy second stack item to top n1 n2 -- n1 n2 n1 ;=C P! 16-bit port output n port# -- ;=C P@ 16-bit port fetch port# -- n ;=: PAD returns addr of the text output buffer -- addr ;=C PC! send byte to port b port# -- ;=C PC@ fetch byte from a port port# -- ;=:* PFA convert a NFA to PFA NFA -- PFA ;=? PREV pointer to disk buffer last accessed -- addr ;=?* PRINTER flag controlling printer -- addr ;=: QUERY EXPECT 80 characters to TIB -- ;=: QUIT halt execution, reset interpreter -- ;=C R top of return stack to parm. stack -- n ;=U R# current editing cursor location -- addr ;=:* R/W block read/write, f=1=write, f=2=read addr blk f -- ;=U R0 return stack base -- addr ;=C R> pop return stack to parm. stack -- n ;=#+ REC/BLK number of disk records to fill 1 buffer -- n ;=?+ RECORD disk record last accessed -- addr ;=: REPEAT end of BEGIN..WHILE..REPEAT structure addr 1 -- ;=C ROT bring the third stack item to top n1 n2 n3 -- n2 n3 n1 ;=C RP! reset return stack ? -- ;=C RP@ push current RP onto parameter stack -- RP ;=C S->D convert a 16-bit number to 32-bits n -- d ;=U S0 parameter stack base -- addr ;=:+ SAVBUF saves buffer at addr if updated addr -- ;=:+ SAVE-BUFFERS flush buffers but don't empty -- ;=U SCR current screen -- addr ;=: SIGN places a '-' in output if n < 0 n d -- d ;=: SMUDGE make the latest definition unFINDable -- ;=C SP! reset parameter stack ? -- ;=C SP@ push current parameter stack pointer -- SP ;=: SPACE output a blank -- ;=: SPACES type n spaces n -- ;=U STATE current interpreter state -- addr ;=C SWAP exchange top two stack items n1 n2 -- n2 n1 ;=: TASK word to mark the end of the dictionary -- ;=: THEN synonym for ENDIF addr 2 -- ;=U TIB Terminal Input Buffer address -- addr ;=C+ TIME! set system time n1 n2 -- ;=C+ TIME@ fetch system time -- n1 n2 ;=C TOGGLE toggle bits at a memory location n addr -- ;=: TRAVERSE move across a fig-FORTH name field addr1 n -- addr2 ;=: TRIAD list screens in groups of three n1 n2 -- ;=: TYPE output n characters beginning at addr addr n -- ;=C U* unsigned mixed multiply u1 u2 -- ud ;=: U. print an unsigned 16-bit number u -- ;=C U/ unsigned mixed divide ud u -- urem uquot ;=: U< unsigned test for top > next item u1 u2 -- f ;=: UNTIL end of BEGIN..UNTIL loop addr 1 -- ;=: UPDATE mark PREV buffer to be saved -- ;=? USE pointer to disk buffer to use next -- addr ;=: USER define a user variable n -- ;=: VARIABLE define a symbolic variable n -- ;=: VLIST print the words in CONTEXT vocabulary -- ;=U VOC-LINK pointer to top vocabulary -- addr ;=: VOCABULARY define a new vocabulary -- ;=: WARM empty disk buffers and abort -- ;=U WARNING switch for error processing: 0, 1, -1 -- addr ;=: WHILE conditional loop BEGIN..WHILE..REPEAT addr 2 -- HERE 4 ;=U WIDTH maximum length of word names -- addr ;=: WORD get a word delimited by char to HERE c -- ;=C XOR bitwise exclusive OR n n -- n ;=: [ suspend compilation to do calculations -- ;=: [COMPILE] compile an otherwise immediate word -- ;=: ] resume compilation after [ --